Post on 15-Jan-2016
description
Keck Observatory in the TMT Era
Keck Strategic Planning meeting September 18, 2009
TMT has selected 13N at Mauna Kea
• MK process • CMP subplans need to be
completed• Final EIS submitted and
accepted• CDUA application prepared
and submitted• CDUP issued• Legal issues resolved• Schedule, with legal
challenge periods included and optimistically assuming success has CDUP issued in October 2010
TMT Early-Light capabilities
• MOBI: 0.32µ - 1µ, R=1000, 3000, 8000 (0.7 slit width), 40 arcmin2
LRIS-like with added cross-dispersed higher-R mode
NFIRAOS
• TMT AO system is designed to deliver rms wavefront error of 190nm and to pass a 2-arcminute (diameter) field, with good correction over 30-arcsecond (diameter) field.
• Performance is comparable to NGAO
5
InstrumentSpectral
ResolutionScience Case
Near-IR DL Spectrometer & Imager
(IRIS)~4000
Assembly of galaxies at large redshift
Black holes/AGN/Galactic Center
Resolved stellar populations in crowded fields
Astrometry
Wide-field Optical Spectrometer
(WFOS)1000-5000
IGM structure and composition 2<z<6
High-quality spectra of z>1.5 galaxies suitable for measuring stellar pops, chemistry, energetics
Near-field cosmology
Multi-slit near-DL near-IR Spectrometer
(IRMS)2000 - 5000
Near-IR spectroscopic diagnostics of the faintest objects
JWST follow-up
Mid-IR Echelle Spectrometer & Imager
(MIRES)5000 - 100000
Physical structure and kinematics of protostellar envelopes
Physical diagnostics of circumstellar/protoplanetary disks: where and when planets form during the accretion phase
ExAO I
(PFI)50 - 300
Direct detection and spectroscopic characterization of extra-solar planets
High Resolution Optical Spectrograph
(HROS)30000 - 50000
Stellar abundance studies throughout the Local Group
ISM abundances/kinematics, IGM characterization to z~6
Extra-solar planets!
MCAO imager
(WIRC)5 - 100
Precision astrometry
Stellar populations to 10Mpc
Near-IR, DL Echelle
(NIRES)5000 - 30000
Precision radial velocities of M-stars and detection of low-mass planets
IGM characterizations for z>5.5
TMT First Decade Instrument/Capability Suite
IRIS - Infrared imaging spectrometer
Grating
IRIS dewar
(at 77k)
Common spectrograph and camera for both IFUs
imager filter wheels
F/15 AO Focus
2’WFS
imagerIFUs
IRIS is OSIRIS-like. Works at diffraction limit, multiple plate scales
IRMS - Infrared multislit spectrometer
0.8 - 2.5 um cryogenic multi-slit spectrometer
2.3 arcmin field of view
0.06 arcsec sampling
46 moveable slits 2.4” long
Covers entire Y, J, H or K band at R = 4660
TMT Schedule
• Current first-light date with NFIRAOS, MOBIE, IRMS and IRIS is Fall 2018
• This is based on a resourced schedule and some assumptions about completing the partnership and feeding funding to the project.
• Not likely to be delivered any earlier than this• Commissioning will be carried out over irst two
years (only part of the time will be available for science)
Keck in the TMT Era
• Complementary capabilities– Wider-field MOS– High-R at all wavelengths– Visible-light AO– Natural complementarity set by source brightness
• Feeder capabilities• Complementary uses
– Concentrate on larger programs– Concentrate on specialized instruments